OPERATING SEGMENTS (Details) $ in Millions		12 Months Ended
		Dec. 31, 2022 USD ($) country segment wealthManagementCenter	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of business segments | segment		3
Number of countries containing operations | country		20
Number of wealth management centers | wealthManagementCenter		4
Segment Reporting Information [Line Items]
Net interest revenue		$ 48,668	$ 42,494	$ 44,751
Non-interest revenue		26,670	29,390	30,750
Total revenues, net of interest expense		75,338	71,884	75,501
Operating expense		51,292	48,193	44,374
Provisions for credit losses and for benefits and claims	[1]	5,239	(3,778)	17,495
Income (loss) from continuing operations before taxes		18,807	27,469	13,632
Tax effect		3,642	5,451	2,525
Income (loss) from continuing operations		15,165	22,018	11,107
Identifiable assets		2,416,676	2,291,413	2,260,000
Average loans		653,000	668,000	685,000
Average deposits		1,333,000	1,335,000	1,230,000
Operating Segments | North America
Segment Reporting Information [Line Items]
Total revenues, net of interest expense		34,400	34,400	37,100
Identifiable assets		776,000	709,000	741,000
Operating Segments | EMEA
Segment Reporting Information [Line Items]
Total revenues, net of interest expense		14,900	13,400	13,400
Identifiable assets		773,000	742,000	684,000
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Total revenues, net of interest expense		9,900	9,200	9,400
Identifiable assets		184,000	179,000	180,000
Operating Segments | Asia
Segment Reporting Information [Line Items]
Total revenues, net of interest expense		14,700	14,400	15,800
Identifiable assets		588,000	572,000	572,000
Operating Segments | Institutional Clients Group
Segment Reporting Information [Line Items]
Net interest revenue		17,911	14,999	15,750
Non-interest revenue		23,295	24,837	25,343
Total revenues, net of interest expense		41,206	39,836	41,093
Operating expense		26,299	23,949	22,336
Provisions for credit losses and for benefits and claims		911	(2,490)	4,869
Income (loss) from continuing operations before taxes		13,996	18,377	13,888
Tax effect		3,258	4,069	3,077
Income (loss) from continuing operations		10,738	14,308	10,811
Identifiable assets		1,730,000	1,613,000	1,592,000
Average loans		291,000	287,000	298,000
Average deposits		830,000	828,000	780,000
Operating Segments | Personal Banking and Wealth Management
Segment Reporting Information [Line Items]
Net interest revenue		22,656	20,646	22,326
Non-interest revenue		1,561	2,681	2,814
Total revenues, net of interest expense		24,217	23,327	25,140
Operating expense		16,258	14,610	13,599
Provisions for credit losses and for benefits and claims		3,754	(1,224)	9,885
Income (loss) from continuing operations before taxes		4,205	9,941	1,656
Tax effect		886	2,207	334
Income (loss) from continuing operations		3,319	7,734	1,322
Identifiable assets		494,000	464,000	453,000
Average loans		321,000	307,000	304,000
Average deposits		435,000	417,000	358,000
Operating Segments | Legacy Franchises
Segment Reporting Information [Line Items]
Net interest revenue		5,691	6,250	6,973
Non-interest revenue		2,781	2,001	2,481
Total revenues, net of interest expense		8,472	8,251	9,454
Operating expense		7,782	8,259	6,890
Provisions for credit losses and for benefits and claims		571	(62)	2,739
Income (loss) from continuing operations before taxes		119	54	(175)
Tax effect		128	63	(33)
Income (loss) from continuing operations		(9)	(9)	(142)
Identifiable assets		97,000	125,000	131,000
Average loans		41,000	74,000	83,000
Average deposits		52,000	82,000	81,000
Corporate/Other
Segment Reporting Information [Line Items]
Net interest revenue		2,410	599	(298)
Non-interest revenue		(967)	(129)	112
Total revenues, net of interest expense		1,443	470	(186)
Operating expense		953	1,375	1,549
Provisions for credit losses and for benefits and claims		3	(2)	2
Income (loss) from continuing operations before taxes		487	(903)	(1,737)
Tax effect		(630)	(888)	(853)
Income (loss) from continuing operations		1,117	(15)	(884)
Identifiable assets		96,000	89,000	84,000
Average loans		0	0	0
Average deposits		$ 16,000	$ 8,000	$ 11,000

[1] This total excludes the provision for credit losses on AFS securities, which is disclosed separately above.